A2M1ACQ12VDC1.9D

Relay Automotive Overview

The A2M1ACQ12VDC1.9D is a 12VDC automotive relay manufactured by CIT Relay and Switch. It features an SPST-NO contact configuration with a maximum switching current of 40A at 14VDC and a maximum switching voltage of 75VDC. The coil operates at a rated voltage of 12VDC, drawing approximately 133.3mA to 158.3mA depending on specific variant tolerances, with a coil resistance of roughly 90 ohms. The unit measures 26.0 x 26.0 x 24.5 mm (with height up to 39.5mm) and utilizes AgSnO2 contact material for reliable performance in high-current applications.

Relay Automotive Feature Summary

• Large switching capacity supporting up to 40A loads
• Compact design suitable for space-constrained automotive environments
• Versatile mounting options including PCB pins and quick connect terminals

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• High-current circuit switching

Relay Automotive Procurement Notes

Verify the specific suffix '1.9D' against official CIT documentation to confirm exact coil characteristics and terminal configuration. Ensure compatibility with existing PCB layouts or harness connectors. Check RoHS compliance status if required for your manufacturing standards. Confirm that the 40A rating aligns with your circuit's peak load requirements without exceeding thermal limits.

Relay Automotive Selection Notes

Select this model when a normally open single-pole switch is required for 12VDC automotive circuits. The 40A rating distinguishes it from lower-capacity variants like the A21 series. Consider the physical dimensions and mounting style relative to available space. Verify coil voltage tolerance matches your power supply stability to ensure consistent actuation.

Relay Automotive Part Context

This component belongs to the CIT A2M series of automotive relays, designed for robust performance in vehicle environments. The series is known for QS-9000 and ISO-9002 certified manufacturing processes. It shares form factors with other A2M variants but differs in contact arrangement and coil specifications. The product line emphasizes durability and large switching capacity for demanding automotive loads.

Relay Automotive Replacement Considerations

Direct substitutes may include other CIT A2M series relays with identical 12VDC coil ratings and 40A SPST-NO contacts. Verify mechanical footprint and pinout compatibility before substitution. Cross-reference part numbers such as A2M1USP12VDC1.6 or A2M1ACQ12VDC1.6 only if their electrical parameters match the application requirements exactly.